qeth: l3 fix build error in ipv6 addr list handling

Adapt qeth l3 to:
commit c2e21293c054817c42eb5fa9c613d2ad51954136
(ipv6: convert addrconf list to hlist)
converted lst_next member of inet6_ifaddr struct to a hlist.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index b3b6e87..0b06f06 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1928,7 +1928,7 @@
 	in6_dev = in6_dev_get(vlan_group_get_device(card->vlangrp, vid));
 	if (!in6_dev)
 		return;
-	for (ifa = in6_dev->addr_list; ifa; ifa = ifa->lst_next) {
+	list_for_each_entry(ifa, &in6_dev->addr_list, if_list) {
 		addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
 		if (addr) {
 			memcpy(&addr->u.a6.addr, &ifa->addr,